Big Aluminum says the aluminum tariff won't work

Association says tariffs will hurt US companies

President Donald Trump (2R) participates in a meeting with leaders of the steel and aluminum industries at the White House March 1, 2018 in Washington, DC.

NEW YORK (CNNMoney) - Even big aluminum doesn't want Trump's tariffs.

The Aluminum Association told the president in an open letter that it is "deeply concerned" by the damage a global aluminum tariff could inflict on US jobs and production. The association represents American aluminum companies.